<?php
/**
 * Description
 *
 * PHP version 7
 *
 * @category Custom
 * @package  Custom
 * @author   ryu <mo5467@126.com>
 * @date     2020-04-23 23:52:37
 * @lastTime 2020-05-01 23:05:08
 * @license  https://opensource.org/licenses/MIT MIT License
 * @link     none
 */

namespace Design\Structural\Adapter;

interface Book
{


    public function turnPage();


    public function open();


    public function getPage(): int;


}//end interface
